FIR

A fir is a type of evergreen coniferous tree.

Fir or FIR may also refer to:

• F.I.R., a Mandarin pop music group from Taiwan
• F.I.R (1999 film), a Malayalam action film
• F.I.R. (TV series), an Indian sitcom
• Falling In Reverse, an American rock band
• Fahrner Image Replacement
• Far infrared
• Finite impulse response
• Firan language
• First Information Report
• Flats Industrial Railroad, a defunct American railroad company
• Flight information region
• Free ideal ring
• French Indian rupee, a defunct currency
• Italian Rugby Federation (Italian: Federazione Italiana Rugby)
• Research Institute for Operations Management (German: Forschungsinstitut für Rationalisierung), in Germany
• USCGC Fir, either of two ships of the United States Coast Guard
• International Federation of Resistance Fighters – Association of Anti-Fascists, FIR Fédération Internationale des Résistantes - Association des Antifascistes